Phonograph.



ITED- str rEs PATENT: OFFICE.

WIlZ LLIA M"W. MccAULEY, or MADRID, town.

Specification of Letter s'latent.

' PHoNoGRAPH;

Application filed May 5, 1910; 'Seri'aI No. 559,513. Y

To all w om a may comm.- Be known that I, WI LIAM IV. MCCAU- LEY, acitizen of the United States, residing at Madrfichinthe county ofBooneand State.

of Iowa, have invented a certain new and useful Phonograph, of which thefollowingis a specification.

My invention" relates to that class of phonographs'in which thereproducing disk is provided with a weighted extension to yieldinglyhold "same in'engagement with a phon'o'graphio record.

Y My object is to provide'a device in the nature ofan attachment thatmay be applied to 'phonographs of this class to apply a yieldingpressure to the reproducing disk in order to yieldinglyhold thereproducer to the record so that shocks and jars to the phonographicinstrument. will be prevented from throwing, the 'reproducer out of itsproper path of travel on the phonographic record so that in usingextremely hard firmly to the'record to thereby more accuratelyreproducethe sounds than is possible with .a reproducing instrument thatis held v toward the record by a weightonly.

My object is further to provide convenient means for adjusting thespring tension to meet the requirements of use.

My invention consists in certain details, in the construction,arrangement and combi-.

nation of the various parts of the device,

whereby the objects contemplated are at tained, as hereinafter morefully set forth,

pointed out in my claim and illustrated in.

the accompanying drawings, in which:

Figure 1 shows a sectional view of a part of an ordinary phonographhaving my 1m-' proved spring pressure appliance connected therewith.Fig.' 2 shows an enlarged, detail view of the arm that supports thereproducer of a phonograph .with. my improved springattachmentappliedthereto,

. Fig. 3 shows a sectional view on the line to theframe is an arm 13having its free end' slidingly. mounted upon a guide 14. Thesaid armcarries a. reproducer 15 and a disk hereinafter made clear.

' 16 is pivotally connected therewith and pro 1 vided with a wei htedextension 17 to yield-.

ingly-hold the disk 16 toward the record. All of the parts abovedescribed are of the Patented Jan. .31, 19 11 ordinary construction nowin general use I and afurther detailed description thereof 1s deemedunnecessary.

, I My improvement consists in the nature jof an attachmentthat may beapplied to any of .the

tioned.

'It consists of almetal block 18 designed to fit against-the undersurface of the arm 13, At one side of the block I havefixed a metalphonographs of the class above menstrap 19 which is designed to'passover. the

reproducer armand which is provided with a set screw 20 having its endseated in the,

side of the block -.18 opposite from the side to which said'strapish'xed so that the block may. be adjustably a'nddetachably connected withthe arm and so that may lie-firmly fixed in any position in which it isplaced. Extended through the block 18' from its under side is a setscrew21. for purposes The spring for engaging'the reproducing I diskcomprises a curved: body portion 22 having one end inserted between theblock "18 and the arm 13 and preferably provided with a rounded lug-23to engage the arm 13. The other end of the; spring is placed in positionagainst the upper surface of the extension 17 and is preferably placedin a small groove in said extension 17 to thereby prevent lateralmovement of the extension relative to the spring. The arrangement of.

thisspring is such that its tension, as applied to the extension 17, canbe adjusted and regulated by a manipulation of the set-' screw 21. Inaddition to this I have providedmeans whereby the sliding carriagecontaining the arm 13 may be held against up and down movement, so as tosmoothly .and'evenly slide from one end of the frame to the other asfollows: In the guide'lt, I have provided a longitudinal slot 24 and inthe overlapping part of the arm 13, I have provided a spring actuatedpin 25 designed to enter said slot and be yieldingly held therein by thespring. \Vhen this pin is in the slot it prevents up and down movementsof the arm 13 and when it is desired to raise the arm the operatorgrasps the pin and pulls it forwardly until it is out of the slot andthen elevates the arm.

a In practical operation it is obviousthat found that with a reprodncerhaving a weighted extension only, any jarring motion applied to thesupport on which the phonograph stands will tend to cause the reproducerarm to vibrate up and down to an extent sufi'icientto interfere with thereproduction of sound and in some instancesthe reproducing point willeven move laterally relative to the record out of its normal path oftravel, thus wholly interrupting the continuous reproduction of soundsas rethe spring serves a number of important corded on the record. Theapplication of functions. First, it will yieldingly hold the reproducertoward the record in such a man' ner as to prevent rebound of thereproducing pointrelative to the record and in addition to this itprevents lateral movements of the reproducing disks and point so thatthe point will not pass out of the groove irrthe record even though theinstrumentis moved or jarred during the process of reproducing soundsthereon.

This attachment is of especial advantage in connection with the use ofrecords of the kind known as indestructible records which are hardenedso that the reproducing points will not wear the records. Further whensuch hard records are used'there is more tendency for the reproducingpoint to vibrate and be shaken out of the normal path of travel ontherecord and I have found that by means of the improved spring. attachmentthe reproducing point may be guided more accurately and held more firmlyto the record than by the use of the weighted extension alone regardlessof the amount of the weight.

I claim as-my invention: a

The combination with a phonograph having a reproducing disk and aweighted ex-' tension 7, connected with said disk for normally holdingthe reproducing disk toward a record, saidweighted extension beingprovided with a notch in its upper surface and an arm for supportingsaid disk, of a block placed adjacent to the under surface of the arm, aflexible strip fixed-at one end to the block, and passed around the ,topof the arm and having a set screw therein seated in the block foradjustably and detachably securing the block to the arm, a spring havinga rounded lug thereon interposed between the block and the arm with itsrounded lug in engagement with the arm, a set screw seated in the blockto engage the spring, the said spring being extended to positionwith itsfree end resting in the notch of said weighted extension for applying ayielding pressure to the weighted extension and for lim-.

iting the lateral movements ofsaid weighted extension, substantially asand for the purposes stated.

Des Moines, Iowa, March 12, 1 910.

\VILLIAM IV. M CAULEY.

\Vitnesses MARY WALLACE, IV. A. Lov'rus.

